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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v, stopp5f m:-th0xng c5 f9frs in time t when maximum braking force is applied. Assuming the braking force is ihg509 c :m5-xt pnfrffndependent of mass, what time would be required to stop a car of mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velociq4too6ca*9 r,b6byy x2o kpb .ty of a moving object is doubled, its_______is also doubled.c6 qbboybak,9*x 4 .2 poo6yrt

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnet ltx/-why)(rwdz 5lcos;d s z,ixr yi92qj*(- $\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most closelyc.1w d8o3ld hk 6ngzg: associated with the following observation about an isolated object: “The linear momentum of the object is cons. 1z nl :gchow6dk8gd3tant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is alwa/mhnu 2jbe).f:ro b6- p./z fd.rsff: ly (phnys in the same direction as th2yejn.zfpfrrm /h: -/p(.):fu bl nd.bhf6soe

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force act to produce a change in momentum of9x5n+ m vz-cwjzrq46 t 200 kg.m/z rntw-qzv6m5 + c4xj9s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q can have more kinetic energy4 6dsjo:c vhv/asez4vi40( uv than P if it: 444o:6edvvh/jasv ui0s(v zc

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg and a speed oll zlnrazjo:0 7 0t4p/f 6.0 m/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting o/0rn 4 zltjzla:7l0 opn the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a height of 4 meters on t)t c.,aad1ecz o a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. What is the averea1.tzc acd ),age force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass mo4gf2e4sm 0eycdmo ( l1ves at 10.0 m/s when it has a collision in space. The mass’s speed was unchanged, but the direction of its velocity was altered(em m40 lfces24 1yogd by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking :ycuo-np89u j a 0.125 kg-baseball is in contact with the ball for a time of 0.03 seconds. The ball travels in a straight l:8nuy-ouc9 j pine as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal kinetic energy ofsz5. yxn14 tti 100.0 J and an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving nz1i4y t5txs. in the x-y plane. What is they-component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a point object of mass M moves wit3h a,)yziaz8p h velocity V, has acceleration a, and is at position (x,y). In what direction must the linear momentum of the object be di 8aazpi )hy3,zrected at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falling straight downward hits the grou: e9l4 h x ;xo+gal-,qjm.gyiund with a speed of 0.90 m/s and then rebounds straight upward oe x;g,4xl-ja+.m uq:ylhi9 gwith a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling straigcqn k)):;ila mht downward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g =mq)i);c kl a:n 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is begggis*9m 97 0gefjxr(-yehi2 ing pushed to the right across a horizontal surface while a constant frictional force of 8.0 N acts sie7g (ghx920gijey- g* m9fr on the box. At some instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being push 8 vzl euf59idboz0*k;l+o+tj ed to the right across a horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude5ze+bf d tj 9llo uv;0z*+8iko of the linear momentum of the box at this instant?

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